# Optical Attenuator CBO SFA23BK12 Singlemode ST Simplex 12 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa23bk12--4467321
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA23BK12
**EAN:** 4063232045177
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa23bk12--4467321

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

Passive optical attenuator CBO SFA23BK12 for singlemode fiber networks with an ST simplex connector and a fixed attenuation of 12 dB. Designed to reduce signal power between fiber-optic devices to prevent receiver overload or to balance link budgets. Suitable for lab use, installations, testing and maintenance of telecom and data networks.

## Long description

Optical Attenuator CBO SFA23BK12 Singlemode ST Simplex 12 dB is a passive inline device designed for singlemode fiber networks. It provides a fixed attenuation of 12 dB via an ST simplex connector, allowing controlled reduction of optical power between transmitters and receivers. The attenuator is intended for installation in fiber links where signal level adjustment is necessary to prevent photodetector saturation, to balance link budgets or to emulate real-world link loss during testing and maintenance.
Advantages
The attenuator offers predictable, stable optical loss with a fixed 12 dB value and a compact ST simplex form factor compatible with equipment using ST connectors. Its passive design requires no power and delivers low back reflection and consistent attenuation across a singlemode wavelength range. The small footprint and rugged housing make it suitable for use in lab environments, field installations and test benches where space and connector compatibility matter.
Suitable for
Reducing optical signal power to prevent receiver overload
Balancing link budgets in singlemode fiber installations
Laboratory testing and characterization of optical equipment
Maintenance and troubleshooting of telecom and data networks
Key specifications
Fiber type: singlemode
Connector type: ST simplex
Attenuation: fixed 12 dB
Device type: passive inline attenuator
Typical application: optical power reduction and link loss emulation
How to use
Insert the ST simplex connector of the attenuator between the transmitting and receiving optical devices, ensuring clean, properly seated connectors to minimize additional loss. Verify connector endfaces are clean before mating. Once installed, the device provides a fixed 12 dB reduction of optical power; no configuration or power supply is required. For temporary measurements, mount the attenuator into the test lead or patch panel as needed and remove or replace it when adjusting link power or completing tests.
Usage recommendations
For reliable performance, inspect and clean fiber endfaces before use and avoid exceeding the optical power rating of connected equipment. Store the attenuator in a dust-free environment when not in use and avoid exposing it to excessive mechanical stress. Use this attenuator with compatible singlemode ST connectors and verify optical power levels with a calibrated power meter after installation to confirm intended attenuation.

## FAQ

### How much does the Optical Attenuator CBO SFA23BK12 12 dB ST Simplex cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All BlueOptics products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized BlueOptics service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/4467321/59854382_large.webp